switch to v5 (#890)

* switch from v4 to v5

* remove deprecated entities

* remove "2" suffix from entities

* rename TransportProtocol into Protocol

pkg/headers/authorization_test.go

@@ -5,7 +5,7 @@ import (
 
 	"github.com/stretchr/testify/require"
 
-	"github.com/bluenviron/gortsplib/v4/pkg/base"
+	"github.com/bluenviron/gortsplib/v5/pkg/base"
 )
 
 var casesAuthorization = []struct {
@@ -21,7 +21,6 @@ var casesAuthorization = []struct {
 		Authorization{
 			Method:    AuthMethodBasic,
 			Username:  "myuser",
-			BasicUser: "myuser",
 			BasicPass: "mypass",
 		},
 	},